I am trying to print from my laptop to the main computer where the shared printer is located. We updated Avast and found a trojan on the pc. It was moved to chest and subsequent scans have come back clean. But now I am unable to print and receive the RPC is unavailable error. I have done the obvious already and checked the services. They are running and set to automatic. Anything else I can try?
Pls post it here:https://forum.avast.com/index.php?board=4.0
Post logs to assist in cleaning malware:https://forum.avast.com/index.php?topic=53253.0 
I fixed it by restarting the print spooler. Thanks.